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1 /*
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2
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3 Package: dyncall
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4 Library: dyncall
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5 File: dyncall/dyncall_callvm_mips_n32.c
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6 Description: mips "n32" ABI callvm implementation
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7 License:
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8
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9 Copyright (c) 2007-2015 Daniel Adler <dadler@uni-goettingen.de>,
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10 Tassilo Philipp <tphilipp@potion-studios.com>
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11
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12 Permission to use, copy, modify, and distribute this software for any
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13 purpose with or without fee is hereby granted, provided that the above
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14 copyright notice and this permission notice appear in all copies.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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23
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24 */
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25
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26
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27
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28 /*
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29
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30 dyncall callvm for 64bit MIPS family of processors
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31
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32 SUPPORTED CALLING CONVENTIONS
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33 n32
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34
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35 REVISION
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36 2010/05/30 initial
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37
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38 in contrast to o32, there is no space reserved for parameters
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39 passed over registers.
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40 more registers are used and registers are always used.
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41
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42 stack is always 16-byte aligned at entry (call to call-kernel automatically
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43 aligns argument stack.
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44
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45 integer and float register-file is interleaved either taking one slot up
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46 skipping the other.
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47
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48
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49 */
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50
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51
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52 #include "dyncall_callvm_mips_n32.h"
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53 #include "dyncall_alloc.h"
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54 #include "dyncall_utils.h"
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55
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56 static void dc_callvm_reset_mips_n32(DCCallVM* in_self)
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57 {
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58 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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59 dcVecReset(&self->mVecHead);
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60 self->mRegCount = 0;
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61 self->mRegData.mUseDouble = 0LL;
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62 }
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63
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64 static DCCallVM* dc_callvm_new_mips_n32(DCCallVM_vt* vt, DCsize size)
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65 {
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66 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)dcAllocMem(sizeof(DCCallVM_mips_n32)+size);
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67 dc_callvm_base_init(&self->mInterface, vt);
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68 dcVecInit(&self->mVecHead, size);
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69 dc_callvm_reset_mips_n32( (DCCallVM*) self );
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70 return (DCCallVM*)self;
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71 }
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72
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73
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74 static void dc_callvm_free_mips_n32(DCCallVM* in_self)
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75 {
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76 dcFreeMem(in_self);
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77 }
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78
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79 /* pass arguments :
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80
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81 - promote to 64-bit integer.
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82 - fill up integers and float - left-to-right otherwise go over stack.
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83 */
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84
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85 /* arg int -- fillup 64-bit integer register file OR push on stack */
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86
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87 static void dc_callvm_argLongLong_mips_n32(DCCallVM* in_self, DClonglong Lv)
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88 {
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89 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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90 /* fillup integer register file */
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91 if (self->mRegCount < 8)
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92 self->mRegData.mIntData[self->mRegCount++] = Lv;
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93 else
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94 dcVecAppend(&self->mVecHead, &Lv, sizeof(DClonglong));
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95 }
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96
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97 static void dc_callvm_argInt_mips_n32(DCCallVM* in_self, DCint i)
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98 {
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99 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong) i );
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100 }
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101
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102 static void dc_callvm_argPointer_mips_n32(DCCallVM* in_self, DCpointer x)
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103 {
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104 dc_callvm_argLongLong_mips_n32(in_self, * (DClonglong*) &x );
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105 }
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106
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107 static void dc_callvm_argBool_mips_n32(DCCallVM* in_self, DCbool x)
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108 {
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109 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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110 }
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111
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112 static void dc_callvm_argChar_mips_n32(DCCallVM* in_self, DCchar x)
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113 {
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114 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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115 }
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116
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117 static void dc_callvm_argShort_mips_n32(DCCallVM* in_self, DCshort x)
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118 {
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119 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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120 }
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121
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122 static void dc_callvm_argLong_mips_n32(DCCallVM* in_self, DClong x)
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123 {
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124 dc_callvm_argLongLong_mips_n32(in_self, (DClonglong)x);
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125 }
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126
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127 static void dc_callvm_argDouble_mips_n32(DCCallVM* in_self, DCdouble x)
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128 {
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129 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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130 if (self->mRegCount < 8) {
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131 self->mRegData.mUseDouble |= 1<<( self->mRegCount );
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132 self->mRegData.mFloatData[self->mRegCount++].d = x;
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133 } else {
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134 dcVecAppend(&self->mVecHead, &x, sizeof(DCdouble) );
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135 }
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136 }
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137
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138 static void dc_callvm_argFloat_mips_n32(DCCallVM* in_self, DCfloat x)
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139 {
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140 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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141 if (self->mRegCount < 8) {
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142 /*self->mRegData.mFloatData[self->mRegCount++].d = (DCdouble) x;*/
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143 self->mRegData.mFloatData[self->mRegCount++].f = x;
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144 } else {
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145 dcVecAppend(&self->mVecHead, &x, sizeof(DCfloat) );
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146 dcVecSkip(&self->mVecHead, sizeof(DCfloat) );
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147 }
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148 }
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149
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150
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151 /* Ellipsis calls:
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152 - float is promoted to double (due to ANSI C).
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153 - double is passed via integer register-file (due to MIPS ABI).
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154 */
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155
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156 static void dc_callvm_argDouble_mips_n32_ellipsis(DCCallVM* in_self, DCdouble x)
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157 {
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158 dc_callvm_argLongLong_mips_n32(in_self, * ( (DClonglong*) &x ) );
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159 }
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160
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161 static void dc_callvm_argFloat_mips_n32_ellipsis(DCCallVM* in_self, DCfloat x)
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162 {
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163 dc_callvm_argDouble_mips_n32_ellipsis(in_self, (DCdouble) x );
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164 }
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165
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166
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167 /* Call. */
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168
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169 void dc_callvm_call_mips_n32(DCCallVM* in_self, DCpointer target)
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170 {
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171 DCCallVM_mips_n32* self = (DCCallVM_mips_n32*)in_self;
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172 /* at minimum provide 16-bytes
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173 which hold the first four integer register as spill area
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174 and are automatically loaded to $4-$7
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175 */
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176 size_t size = DC_MAX(16, ( ( (unsigned) dcVecSize(&self->mVecHead) ) +7UL ) & (-8UL) );
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177 dcCall_mips_n32(target, &self->mRegData, size, dcVecData(&self->mVecHead));
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178 }
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179
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180 /* Forward Declaration. */
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181 static void dc_callvm_mode_mips_n32(DCCallVM* in_self,DCint mode);
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182
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183 DCCallVM_vt gVT_mips_n32 =
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184 {
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185 &dc_callvm_free_mips_n32
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186 , &dc_callvm_reset_mips_n32
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187 , &dc_callvm_mode_mips_n32
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188 , &dc_callvm_argBool_mips_n32
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189 , &dc_callvm_argChar_mips_n32
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190 , &dc_callvm_argShort_mips_n32
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191 , &dc_callvm_argInt_mips_n32
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192 , &dc_callvm_argLong_mips_n32
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193 , &dc_callvm_argLongLong_mips_n32
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194 , &dc_callvm_argFloat_mips_n32
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195 , &dc_callvm_argDouble_mips_n32
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196 , &dc_callvm_argPointer_mips_n32
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197 , NULL /* argStruct */
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198 , (DCvoidvmfunc*) &dc_callvm_call_mips_n32
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199 , (DCboolvmfunc*) &dc_callvm_call_mips_n32
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200 , (DCcharvmfunc*) &dc_callvm_call_mips_n32
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201 , (DCshortvmfunc*) &dc_callvm_call_mips_n32
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202 , (DCintvmfunc*) &dc_callvm_call_mips_n32
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203 , (DClongvmfunc*) &dc_callvm_call_mips_n32
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204 , (DClonglongvmfunc*) &dc_callvm_call_mips_n32
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205 , (DCfloatvmfunc*) &dc_callvm_call_mips_n32
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206 , (DCdoublevmfunc*) &dc_callvm_call_mips_n32
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207 , (DCpointervmfunc*) &dc_callvm_call_mips_n32
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208 , NULL /* callStruct */
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209 };
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210
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211 DCCallVM_vt gVT_mips_n32_ellipsis =
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212 {
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213 &dc_callvm_free_mips_n32
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214 , &dc_callvm_reset_mips_n32
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215 , &dc_callvm_mode_mips_n32
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216 , &dc_callvm_argBool_mips_n32
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217 , &dc_callvm_argChar_mips_n32
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218 , &dc_callvm_argShort_mips_n32
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219 , &dc_callvm_argInt_mips_n32
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220 , &dc_callvm_argLong_mips_n32
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221 , &dc_callvm_argLongLong_mips_n32
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222 , &dc_callvm_argFloat_mips_n32_ellipsis
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223 , &dc_callvm_argDouble_mips_n32_ellipsis
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224 , &dc_callvm_argPointer_mips_n32
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225 , NULL /* argStruct */
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226 , (DCvoidvmfunc*) &dc_callvm_call_mips_n32
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227 , (DCboolvmfunc*) &dc_callvm_call_mips_n32
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228 , (DCcharvmfunc*) &dc_callvm_call_mips_n32
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229 , (DCshortvmfunc*) &dc_callvm_call_mips_n32
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230 , (DCintvmfunc*) &dc_callvm_call_mips_n32
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231 , (DClongvmfunc*) &dc_callvm_call_mips_n32
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232 , (DClonglongvmfunc*) &dc_callvm_call_mips_n32
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233 , (DCfloatvmfunc*) &dc_callvm_call_mips_n32
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234 , (DCdoublevmfunc*) &dc_callvm_call_mips_n32
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235 , (DCpointervmfunc*) &dc_callvm_call_mips_n32
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236 , NULL /* callStruct */
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237 };
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238
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239 static void dc_callvm_mode_mips_n32(DCCallVM* self,DCint mode)
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240 {
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241 switch(mode) {
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242 case DC_CALL_C_DEFAULT:
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243 self->mVTpointer = &gVT_mips_n32;
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244 break;
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245 case DC_CALL_C_ELLIPSIS:
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246 self->mVTpointer = &gVT_mips_n32_ellipsis;
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247 break;
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248 default:
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249 self->mError = DC_ERROR_UNSUPPORTED_MODE;
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250 break;
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251 }
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252 }
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253
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254 DCCallVM* dcNewCallVM_mips_n32(DCsize size)
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255 {
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256 return dc_callvm_new_mips_n32(&gVT_mips_n32, size);
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257 }
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258
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259 DCCallVM* dcNewCallVM_mips_n32_ellipsis(DCsize size)
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260 {
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261 return dc_callvm_new_mips_n32(&gVT_mips_n32_ellipsis, size);
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262 }
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263
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264
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265 DCCallVM* dcNewCallVM(DCsize size)
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266 {
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267 return dcNewCallVM_mips_n32(size);
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268 }
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269
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